D. N. Nicolaides, R. Awad, G. Papageorgiou
Mar 1, 1994
Citations
0
Influential Citations
17
Citations
Journal
Journal of Organic Chemistry
Abstract
[10-(Methoxyimino)phenanthren-9-ylidene]acetates 3(I,II), prepared by Wittig olefination of 10-(methoxyimino)phenanthren-9-one (1) with ylide 2, were transformed by means of a [4+2] cycloaddition and methanol elimination to stable spiro-compound 5. In addition, the use of compounds 3 as heterodienes in Diels-Alder reactions with various electron-deficient dienophiles 6a,b, 10a-c, and 14 led to the synthesis of nitrogen-containing polycycles 8a,b, 11a-c, 12b,c, 13b,c, and 16